- What Is the Certified Endoscope Reprocessor Credential?
- Eligibility: The Experience Requirement Explained
- Exam Structure and Question Format
- The Seven CER Exam Domains
- Registration, Fees, and Prometric Scheduling
- Who Hires CER-Credentialed Professionals?
- Mapping a Study Plan to the CER Content Outline
- Annual Renewal Requirements
- Frequently Asked Questions
- You need only 3 months of documented hands-on endoscope reprocessing experience to sit for the CER - no CRCST required first.
- The exam is 150 questions (125 scored, 25 unscored) delivered over 3 hours at a Prometric Testing Center for a $140 USD fee.
- Domain 4 - Endoscope Processing Steps - carries the largest weight at 32% of scored content.
- HSPA administers the CER credential; the current content outline was revised in May 2022.
What Is the Certified Endoscope Reprocessor Credential?
The Certified Endoscope Reprocessor (CER) credential is a specialty certification administered by the Healthcare Sterile Processing Association (HSPA) and delivered through Prometric Testing Centers across the United States. It is designed specifically for technicians and reprocessing professionals who handle flexible and semi-rigid endoscopes - a patient-safety-critical task that demands a depth of technical knowledge well beyond general sterile processing work.
Unlike some credentialing pathways that stack one certification on top of another, the CER stands on its own. You do not need to hold a CRCST (Certified Registered Central Service Technician) before sitting for this exam. The credential recognizes that endoscope reprocessing is a distinct, high-stakes discipline with its own microbiology considerations, device-specific handling protocols, and regulatory expectations.
The current exam is built on a content outline revised in May 2022, meaning the question pool reflects current best practices, device evolution, and updated guidance from organizations like AAMI, SGNA, and ASGE. If you are using older study materials or a prep course built before that revision date, verify that the domain structure and topic coverage align with the 2022 outline before committing to that resource.
Eligibility: The Experience Requirement Explained
The single prerequisite for the CER exam is straightforward but non-negotiable: a minimum of 3 months of hands-on endoscope reprocessing experience, properly documented. HSPA requires candidates to verify this experience as part of the application process. "Hands-on" is the operative phrase - observational rotations, administrative duties adjacent to reprocessing, or sterile processing work that does not include endoscopes does not qualify.
What Counts as Qualifying Experience?
Qualifying experience typically includes direct participation in the full reprocessing cycle: performing pre-cleaning, leak testing, manual cleaning, high-level disinfection (HLD) or sterilization, drying, and storage of flexible endoscopes. Experience in a GI lab, bronchoscopy suite, or central sterile department with a dedicated endoscope reprocessing area all generally qualify, provided the candidate is actively performing - not merely supervising or shadowing.
Three months is a relatively accessible threshold compared to many sterile processing credentials. This reflects HSPA's recognition that some reprocessing technicians are hired directly into endoscope-specific roles and should be able to pursue formal credentialing without a multi-year waiting period. That said, three months of solid hands-on work means you should enter the exam with a genuine command of your facility's reprocessing workflow - not just a passing familiarity.
Key Takeaway
Document your reprocessing hours carefully from your first day on the job. HSPA requires verified experience, and vague attestations can slow or derail your application. Ask your supervisor to confirm your role and scope in writing as early as possible.
No Prerequisite Certification Required
One common misconception is that candidates must first earn their CRCST before pursuing the CER. This is not true. The CER is an independent credential. If your career focus is endoscope reprocessing - and your employer hired you specifically for that role - you can pursue the CER as your primary certification. Many facilities actively encourage this direct path because it produces staff who are credentialed specifically in the work they perform every day.
For a full breakdown of how to verify your eligibility and prepare your application materials, see CER Exam Prerequisites and Eligibility Requirements 2026, which walks through HSPA's documentation requirements in detail.
Exam Structure and Question Format
Knowing the architecture of the CER exam is just as important as knowing the content. Here is exactly what candidates face on exam day:
| Exam Feature | CER Details |
|---|---|
| Total Questions | 150 multiple-choice |
| Scored Questions | 125 |
| Unscored (Pretest) Questions | 25 |
| Time Allowed | 3 hours |
| Exam Fee | $140 USD |
| Testing Format | Computer-based, closed book, at Prometric |
| Pass/Fail Method | Criterion-referenced (Angoff/Beuk methodology) |
| Public Cut Score | Not published |
| Content Outline Version | Revised May 2022 |
What Criterion-Referenced Scoring Actually Means for You
HSPA uses a criterion-referenced approach - specifically the Angoff and Beuk methods - to set the passing standard. This means you are not competing against other test-takers; your performance is measured against a fixed standard of competency determined by subject-matter experts who evaluated what a minimally competent CER candidate must know. HSPA does not publish a numeric cut score, so there is no public "passing percentage" to target. Focus on genuine mastery across all seven domains, not on gaming a specific number.
The 25 unscored pretest questions are embedded throughout the exam without identification. You cannot tell which questions are scored and which are not - so treat every question as if it counts. These pretest items are used by HSPA to evaluate questions for future exam forms.
At 150 questions over 3 hours, you have an average of 72 seconds per question. The exam interface includes tutorial and review tools, so use the brief tutorial at the start to orient yourself before the clock begins on the actual exam content.
The Seven CER Exam Domains
The CER content outline divides the exam into seven domains. Understanding their relative weight tells you exactly where to invest the most preparation time.
Domain 1: Microbiology and Infection Control (12%)
Candidates must understand the microbial threats specific to endoscope reprocessing failures - including biofilm formation, spore-forming organisms, and the Spaulding Classification framework. This domain requires more than memorizing definitions; you need to understand why certain organisms survive inadequate disinfection and how infection control principles translate into reprocessing protocol decisions.
- Biofilm development and its resistance to chemical disinfectants
- Spaulding Classification (critical, semi-critical, non-critical) applied to endoscopes
- Standard and transmission-based precautions relevant to the reprocessing environment
Domain 2: Endoscope Purpose, Design and Structure (10%)
You must be able to identify the components of flexible and semi-rigid endoscopes - insertion tubes, working channels, biopsy ports, light guides, and control bodies - and understand how design features affect cleaning efficacy. Device anatomy knowledge directly informs which cleaning tools, brushes, and adapter sizes are appropriate.
- Endoscope channel configurations and lumens
- Differences between bronchoscopes, colonoscopes, duodenoscopes, and ureteroscopes
- How device design creates reprocessing challenges (e.g., elevator mechanisms on duodenoscopes)
Domain 3: Work Area Design (12%)
The physical environment of a reprocessing suite is a critical infection control variable. This domain covers airflow direction, sink configuration, traffic flow between contaminated and clean areas, and ventilation requirements. Candidates should understand why unidirectional workflow - dirty to clean - is a regulatory expectation, not merely a preference.
- Decontamination area vs. clean assembly area separation
- Sink depth, size, and number requirements for manual cleaning
- Personal protective equipment (PPE) requirements by zone
Domain 4: Endoscope Processing Steps (32%)
This is the largest domain and the core of the CER exam. The entire reprocessing sequence - from pre-cleaning at the bedside through the final storage step - is tested in granular detail. Candidates must know not only what each step involves but also why sequence matters, what happens when steps are skipped or delayed, and how to validate that each step was completed correctly.
- Pre-cleaning (immediate post-procedure) requirements and timing
- Leak testing procedures and criteria for pass/fail
- Manual cleaning: enzymatic detergent selection, brush sizes, channel flushing technique
- High-level disinfection: chemical agents, contact time, temperature, and MEC testing
- Automated endoscope reprocessors (AERs): loading, cycle validation, and troubleshooting
- Rinse water quality requirements and forced-air drying protocols
Domain 5: Endoscope Handling, Transport and Storage (16%)
The second-largest domain addresses what happens to a reprocessed endoscope between the final HLD step and patient use. Storage conditions - hanging cabinet requirements, forced-air drying cabinets, and hang time policies - are high-yield exam topics. Transport containers, contamination risk during transport, and inspection before use are also covered.
- Vertical vs. horizontal storage and contamination implications
- Storage cabinet ventilation and humidity control requirements
- Maximum hang time policies and what triggers a reprocessing cycle
Domain 6: Endoscope Tracking, Repair and System Maintenance (10%)
Tracking systems link a specific endoscope to a specific patient encounter - a regulatory and quality expectation increasingly mandated after high-profile endoscope-related infection outbreaks. This domain also covers damage recognition, loaner scope management, and AER maintenance records.
- Scope tracking by serial number and patient linkage requirements
- Visual inspection for damage to insertion tubes, biopsy valves, and connectors
- Loaner and rental endoscope reprocessing requirements upon receipt
Domain 7: Human Factors That Impact Endoscope Systems (8%)
The smallest domain by weight, but clinically significant. Human factors address how staffing levels, fatigue, workflow interruptions, and training gaps create reprocessing errors. Candidates should understand how system design and checklists reduce reliance on memory and minimize variation in practice.
- Role of checklists and standardized procedures in error reduction
- Impact of interruptions and high-volume throughput on reprocessing quality
- Competency assessment and ongoing training requirements for reprocessing staff
Registration, Fees, and Prometric Scheduling
The CER exam fee is $140 USD, payable to HSPA during the application process. Once HSPA approves your application and issues an eligibility confirmation, you schedule your actual test appointment through Prometric - one of the largest professional examination delivery networks in the world, with testing centers in most metropolitan areas and many smaller cities.
Computer-based delivery at Prometric means a standardized, controlled testing environment: no personal materials, closed book, with the exam delivered on a dedicated workstation. The interface includes a brief tutorial before the exam begins - use it to familiarize yourself with flagging questions for review, navigating between questions, and confirming your final answers before submission.
For step-by-step instructions on finding a test center, choosing a date, and what to bring on exam day, see How to Schedule Your CER Exam at Prometric 2026.
Who Hires CER-Credentialed Professionals?
Demand for CER-credentialed technicians is driven by the healthcare settings where flexible endoscopy is performed and where reprocessing happens on-site. These include:
- Hospital GI (gastroenterology) departments and endoscopy suites - the highest-volume endoscope reprocessing environments, where colonoscopes, gastroscopes, and duodenoscopes are turned over rapidly between cases.
- Ambulatory surgery centers (ASCs) with GI or pulmonary programs - ASCs performing colonoscopies or bronchoscopies increasingly require or prefer credentialed reprocessing staff to meet accreditation standards.
- Hospital bronchoscopy and pulmonology units - where flexible bronchoscopes require the same rigorous reprocessing cycle as GI endoscopes.
- Urology departments and cystoscopy suites - handling semi-rigid and flexible ureteroscopes and cystoscopes that fall under high-level disinfection requirements.
- Central sterile processing departments with endoscope reprocessing responsibilities - in facilities where endoscope reprocessing is centralized rather than department-managed.
Employers in accredited facilities are increasingly aware that CJC (Joint Commission) surveys and state health department inspections focus on endoscope reprocessing documentation and staff competency. A CER credential provides auditable evidence that a staff member has met a national standard - which matters during inspections and gives risk management teams greater confidence in their reprocessing programs.
Practicing with exam-style questions that mirror the real question format is one of the most effective ways to close the gap between clinical experience and exam performance. Explore CER practice tests at cerprep.com to see how your knowledge maps to each of the seven domains.
Mapping a Study Plan to the CER Content Outline
Because the CER content outline gives you explicit domain weights, you can build a study plan that allocates time proportionally - spending the most hours where the most questions live.
Foundations: Domains 1, 2, and 3
- Review microbiology fundamentals specific to endoscope-related pathogens (Domain 1 - 12%)
- Study endoscope anatomy and channel configurations by device type (Domain 2 - 10%)
- Learn work area design requirements: airflow, zones, PPE (Domain 3 - 12%)
- Use flashcards for Spaulding Classification and device component terminology
Core Reprocessing: Domain 4 Deep Dive (32%)
- Work through every step of the reprocessing cycle in sequence - pre-cleaning through storage
- Focus on chemical disinfectant parameters: contact time, temperature, MEC testing
- Study AER loading requirements and troubleshooting scenarios
- Take domain-specific practice questions daily to identify knowledge gaps early
Handling, Tracking, and Human Factors: Domains 5, 6, and 7
- Master storage cabinet requirements and hang-time policies (Domain 5 - 16%)
- Review scope tracking systems and damage recognition criteria (Domain 6 - 10%)
- Study human factors concepts: checklists, interruptions, competency assessment (Domain 7 - 8%)
- Begin timed full-length practice exams to build 3-hour pacing stamina
Integration and Exam Simulation
- Take at least two full 150-question timed practice exams under exam-like conditions
- Review every missed question by domain to identify remaining weak areas
- Return to Domain 4 for final reinforcement - it represents nearly a third of your score
- Confirm your Prometric appointment logistics: location, ID requirements, arrival time
This four-week structure uses spaced repetition naturally - you revisit Domain 4 material in weeks 2 and 4 - without treating study methodology as the main event. The content outline is the main event. If you learn best by teaching concepts back to yourself (explaining leak testing criteria aloud, for instance), that self-explanation habit is most valuable in Week 2 when you are working through the 32% domain.
Supplementing your structured study with targeted CER practice questions after each domain block helps you move from passive recognition to active recall - which is exactly the cognitive mode required during the real exam.
Annual Renewal Requirements
The CER is not a one-and-done credential. It renews annually and requires:
- 6 CE credits specifically in endoscope reprocessing (general sterile processing CE credits do not satisfy this requirement)
- Payment of the HSPA renewal fee
Annual renewal keeps credentialed professionals current as device designs, disinfectant chemistries, and regulatory guidance evolve. Given how frequently guidance documents from AAMI and SGNA are updated, the 6-credit annual requirement is a meaningful professional development expectation, not a bureaucratic formality.
Frequently Asked Questions
No. The CER is an independent credential administered by HSPA. You do not need to hold a CRCST or any other sterile processing certification before applying. The only prerequisite is 3 months of documented, hands-on endoscope reprocessing experience.
Of the 150 total multiple-choice questions, 125 are scored and 25 are unscored pretest items embedded throughout the exam. You cannot identify which questions are pretest items, so treat every question as if it contributes to your result.
HSPA uses a criterion-referenced passing standard determined through the Angoff and Beuk methodologies. No numeric cut score is published publicly. Your performance is compared against a fixed competency standard, not against other candidates' scores.
The CER is delivered at Prometric Testing Centers as a computer-based, closed-book exam. The session begins with a brief tutorial covering the exam interface - flagging questions, navigating, and reviewing answers. Bring valid government-issued photo ID and arrive early. For detailed scheduling guidance, see How to Schedule Your CER Exam at Prometric 2026.
Domain 4 - Endoscope Processing Steps - carries 32% of the exam weight, making it the single most important domain. However, Domain 5 (Endoscope Handling, Transport and Storage) at 16% and Domains 1 and 3 (each at 12%) are also substantial contributors. Allocate your study time proportionally to these weights rather than treating all seven domains equally.